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Description
Rapistrum, also known as turnipweed or bastards, is a plant species in the Brassicaceae family. It is native to Eurasia and North Africa and has been naturalized in various parts of the world, including North America. The plant is an annual or biennial herb that grows erect, reaching a height of up to 3 feet. It has a taproot that can reach up to 30 inches deep, which makes it a drought-tolerant plant.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Brassicales |
| Family | Brassicaceae |
| Genus | Rapistrum |
Appearance
The leaves of Rapistrum are alternate, oblong, and pinnately lobed. The flowers are small and white, with four petals arranged in a cross shape, typical of the Brassicaceae family. The fruits are oblong pods that can reach up to 2 inches long and contain numerous small seeds.
Care Guide
Rapistrum is a hardy plant that requires minimal care. It can grow in various soil types and pH levels, as long as they are well-drained. The plant prefers full sun but can tolerate partial shade. It is drought-tolerant and only needs watering during prolonged dry spells. Fertilization is not necessary, but a general-purpose fertilizer can be applied once a month during the growing season. Rapistrum is hardy in USDA zones 4-8.
Common Pests & Diseases
Rapistrum is usually resistant to pests and diseases. However, it may be susceptible to flea beetles, aphids, and cabbage loopers. These pests can be controlled by handpicking or using insecticidal soap. The plant may also be affected by fungal diseases such as powdery mildew and downy mildew, which can be prevented by avoiding overhead watering and providing good air circulation.
Habitat
Rapistrum is a plant that can grow in various habitats, including fields, roadsides, and disturbed areas. It prefers well-drained soils and areas with full sun exposure. The plant is native to Eurasia and North Africa but has been introduced to other parts of the world, including North America.
Question and Answer
Q: Is Rapistrum edible?
A: No, Rapistrum is not a food crop.
Q: Can Rapistrum be grown in containers?
A: Yes, Rapistrum can be grown in containers as long as they are deep enough to accommodate the taproot.
Q: Does Rapistrum attract pollinators?
A: Yes, Rapistrum attracts bees, butterflies, and other pollinators.
Q: Can Rapistrum be used for medicinal purposes?
A: No, there is no evidence of medicinal use of Rapistrum.
Related Plants
- Brassica nigra (Black mustard)
- Brassica rapa (Field mustard)
- Brassica juncea (Indian mustard)
- Brassica oleracea (Wild cabbage)
References
- USDA Plants Database: Rapistrum
- Missouri Botanical Garden: Rapistrum
- Gardenia: Rapistrum rugosum
- University of Wisconsin-Madison: Rapistrum rugosum
